Bug 2565908 (CVE-2026-121410)

Summary: CVE-2026-121410 freerdp: FreeRDP: Denial of Service via crafted RDPGFX WIRETOSURFACE_2 command
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in FreeRDP. A malicious Remote Desktop Protocol (RDP) server can trigger a Denial of Service (DoS) by sending a specially crafted graphics pipeline command with zero surface dimensions. Because the client fails to validate these empty dimensions, an internal assertion failure or division-by-zero error occurs, terminating the client session and crashing the application.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2566775, 2566776    
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Description OSIDB Bzimport 2026-11-03 16:04:42 UTC
FreeRDP before 3.32.2 contains a denial of service vulnerability in the RDPGFX ALPHA WIRETOSURFACE_2 handler that fails to validate zero surface dimensions. A malicious RDP server can send a crafted WIRETOSURFACE_2 PDU with zero width and height, triggering an assertion or division by zero that terminates the client session.